Irrigation 

 - 4 ed. 
 - London :  Her Majesty's Sationery Office,  1974 
 - 141 p.  : láms : gráfs 
 - Her Majesty's Stationery Office. Bulletin  ; 138 .
 - Her Majesty's Stationery Office. Bulletin  ; 138 .
<br/><br/><label>LCCN: </label>14938 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Irrigación.
<br/><br/><label>Dewey Class. No.: </label>631.7  / G7 1974